<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
    <style type="text/css">



    </style>
</head>
<body>
	<script type="text/javascript">
var a = 5;
//-2
~function(a,b){alert(a+b)}(~function(a){return -a}(a),~function(a){return a}(a))

//return -() -1  4   -6

	</script>
</body>
</html>